景洪广告衫批发公司

Quality problems and solutions in Kunming colorful flag screen printing operations
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. Line distortion
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. Caused by too much screen printing and the relaxation of the screen template; The distance between the positioning loose screen plate and the substrate changes; the angle between the scraper and the substrate is wrong or the force is uneven; the consistency of the printing material is too thin or too dry; the printing surface of the reworked workpiece is cleaned and the solvent does not dry out before screen printing, etc.

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. The solvent in the printing material is unevenly dispersed
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. After wiping the screen, the solvent on the screen mold or The cleaning agent is not dry or the surface is not clean when the workpiece is reworked; the sealing force of the printing material after the first scraping is too strong, causing a small amount of printing material to squeeze out of the mesh

- . ;< br/>. Squeegee movement during printing
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. Movement

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. The speed is effective in the substrate There is too big a difference in the area, stopping midway or repeating printing, etc.; the fineness of the printing material does not match the selected screen mesh.
The dirt has not been removed and the large particles of the printing material cannot pass through the high-mesh screen; the screen printing drying speed is too fast and the screen printing workplace is drafty; the fast-drying printing material cannot be sealed in time to form a net; the force used when scraping is uneven, large or small; The surface of the substrate is uneven, etc.
When the material is not mature enough, the residual air bubbles in the printing material are not cleaned out, and the air bubbles stick to the substrate after screen printing; the surface of the substrate is not clean, dust and other factors affect the printing, the force is not light and uneven, or the scraping force is insufficient; on the substrate Caused by dust in the place where the printing material is not dry; the distance between the screen and the substrate is too large under suitable conditions for the printing material; and the pre-press screen cleaning is not thorough.
A small plane is in contact; the distance between the screen and the substrate is small or the tension of the screen is small; the printing force is too large during screen printing, the ink layer is thick and sticks to the screen; the printing material is too thick, etc.
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. Solution
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. Carefully analyze the reasons that affect quality and solve the quality problems in non-scratching operations based on the causes. For example, the problem of stretching the net, the optimal distance, the production of screen printing templates, the surface treatment of the workpiece, and the selection of printing materials will all affect the quality of screen printing.
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